So I bought myself one of these units so I could turn my trunk running lights into brake/turn signal lights. I worked on it off and on for 3 days, contacting Signal Dynamics (who have been extremely patient and helpful) to help me figure out why I have what looks like 4-way emergency flashers everytime I try using the turn signals. Near as I can figure out, there is only 1 wire leading to BOTH running lights, in which case I don't how the turn signals could work in the first place. According to the schematics in my Vision manual, it looks like the wiring splits off to form a "Y"...with each light having it's own wire. I cut the "left" side of the "Y" leading to what I thought was the left running light...which stayed on, so I'm simply back to scratching the little hair off I have left.

There is only one wire going to the running lights as far as I remember. When I installed my Kuryakin module I had to run new wire from the turn signal wires up to the trunk. I used the running light wire for my lighted victory badge.

That's what I'm thinking is going on here. I cut the wire at a "Y" that was approximately 2 inches downstream from the trunk harness and the left side running light stayed lit. Today I'm pulling the liner off the lid to visualize the wiring and figured there HAS to be another "Y" up there somewhere.

Okie-Dokie....I got the unit installed and everything works like it should and, best of all, I don't have any parts left over. I hit my local library to download the pictures I took during the disassembly process, but like all best laid plans, I get here and my phone's about dead. I can't thank Mike Johnson of Signal Dynamics enough for all his patience and help with all my questions and emails over the last few days. He's a Saint in my opinion.

Anyway, the trunk lights work they way Vic should have done it in the first place and I couldn't be happier.

Yes I used the Tri-Star XP instead. The biggest issue I had during installation was being an idiot and not simply pulling the inner trunk lid-liner off so I could visualize the wires that I needed to splice into. It's a fairly simple job and I personally went with Tri-Star after reading some of the concerns about the 4710 unit and cruise control issues. I've had no such concerns with the Tri-Star unit and it does, indeed, light up the back end way better than stock when the brakes are applied.

A friend I ride with often said he wasn't too impressed with the lights until he happened to be riding behind me one night when I hit the brakes BIG difference!, he said.